Kaya buys a $20 phone card. She is charged $.15 per minute for calls. What equation gives the value v left on her card after she makes t minutes of calls?

Kaya buys a $20 phone card. She is charged $.15 per minute for

calls. What equation gives the value v left on her card after she makes
t minutes of calls?

1 Answer

Kaya buys a $20 phone card. She is charged $.15 per minute for calls. What equation gives the value v left on her card after she makes t minutes of calls?

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